Holley EFI Main Engine Wiring Harness 5.0L Ford Engine
Highlights
- Designed For TFI Distributors
- Compatible With Holley Systems
- Plug-And-Play Installation
- For OEM Ford Fuel Injectors
Holley EFI Plug-And-Play Main Engine Wiring Harness for 5.0L and 5.8L Small-Block Ford Engines.
If you're looking for an engine wiring harness that can take your 5.0L or 5.8L Small-Block Ford Engine to the next level, you need the Holley EFI Plug-And-Play Main Engine Wiring Harness (558-128). This versatile harness is designed to work seamlessly with TFI distributors and offers plug-and-play ignition compatibility with both Dual Sync and HyperSpark Distributors.
Features and Benefits:
- Designed for use with TFI distributors
- Plug-and-play ignition capability with Dual Sync and HyperSpark Distributors
- Compatible with Holley EFI Dominator, HP, and Terminator X and X Max ECUs
- Comes pre-terminated with Ford PWM IAC connector
- For use with OEM Ford fuel injectors
- Versatile harness
- Made from premium components
- Enhances performance
Compatible with Holley EFI Dominator, HP, and Terminator X and X Max ECUs, this high-quality wiring harness comes pre-terminated with a Ford PWM IAC connector to support OEM PWM idle air control motors. Made from premium components, it's built to last and will enhance your engine's performance to an impressive degree.
Tech Tips:
- Ignition adapter P/N: 558305 is required for applications with a TFI distributor.
- Use injector harness P/N: 558209 if using OEM Ford fuel injectors.
Vehicle Fitment:
- 1965-1995 Mustangs
- 1948-1979 F-100s
- 1966-1977 Broncos
California Residents: Proposition 65 Warning
Related Categories: Mustang Parts, Mustang Electrical & Wiring, Mustang EFI Engine & Injector Harnesses, Ford Bronco Parts, Ford F-100 Parts
Only for use on pre-pollution controlled vehicles: This product can be used on vehicles that were manufactured before emissions control regulations were imposed. Pre-pollution vehicles are defined as:
- 1965 and older U.S. manufactured California certified vehicles
- 1967 and older U.S. manufactured federally certified vehicles
Installation Difficulty
Intermediate skill is required for this installation.
Installation Instructions
Vehicle Fitment
This product will fit the following Bronco years:
This product will fit the following F-100 years:
- 1948,
- 1949,
- 1950,
- 1951,
- 1952,
- 1953,
- 1954,
- 1955,
- 1956,
- 1957,
- 1958,
- 1959,
- 1960,
- 1961,
- 1962,
- 1963,
- 1964,
- 1965,
- 1966,
- 1967,
- 1968,
- 1969,
- 1970,
- 1971,
- 1972,
- 1973,
- 1974,
- 1975,
- 1976,
- 1977,
- 1978,
- 1979,
This product will fit the following Mustang years:
